Page_fault? how to debug?

For Developers
1 
[  217.818022] do_page_fault(): sending SIGSEGV to dnsmasq for invalid read access from 00000000
[  217.826932] epc = 77e2e2a8 in ld-musl-mips-sf.so.1[77dae000+a9000]
[  217.833263] ra  = 555ce20f in dnsmasq[555b0000+2f000]
2

bad pointer? Not sure what tools are available - electric fence perhaps?

https://elinux.org/Electric_Fence